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Monarch GPS Receiver

Precise Positioning With Unsurpassed Flight Heritage

General Dynamics’ Monarch Precise Positioning Service, Global Positioning Service (PPS-GPS) receiver is designed to meet demanding requirements for any Earth-orbital missions in sight of the GPS constellation. Our use of advanced digital signal processing technology has set a new standard for spaceborne receiver pseudo-range and carrier phase performance, while affording significant improvements in reliability, radiation hardness and power dissipation. A modular approach to the mechanical design, combined with software/firmware flexibility, allows easy customization for user-specific applications.

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Product Details

Features

General Dynamics' Monarch Receiver provides precise positioning service position, velocity and time information for Department of Defense low Earth orbit (LEO) and geo-synchronous Earth orbit (GEO) applications. The Monarch includes SAASM (anti-spoof) security features.

  • Qualified and tested for the space environment: pyrotechnic shock, random vibration, thermal-vacuum, EMI/EMC, natural radiation, and SEU/SEL
  • Modular design allows for multiple configuration options
  • Provides near real-time position, velocity and time measurements for superior user performance
  • Relative navigation capability allows for differential position, velocity and time determination between coorbiting spacecraft.
  • Precision time stamping allows unprecedented accuracies in space
  • Pps key management supports all Selective Availability Anti-spoof Module (SAASM) unique keying
  • Single or dual antenna capability allows the spacecraft user installation flexibility and performance
  • Uses the radiation hardened Key Data Processor (KDP)
  • Available In LEO, MEO or GEO configurations
  • Granted the navstar Global Positioning System (GPS) Joint Program Office (JPO) SAASM security approval

Specifications

Monarch GPS Receiver Data Sheet

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Type of Service Precise Position Service (PPS)
Number of Simultaneous Antennas 1 or 2
Frequencies L1 & L2
Signal Power L1 C/A -135 dBm min.
L1 P(Y) -138 dBm min.
L2 P(Y) -138 dBm min.
Number of Channels 12
Reference Oscillator* Internal OCXO (user supplied optional)
Interface* MIL-STD-1553B or NASA STD
RIU (optional 100 record history buffer)
Pseudo-range 25 cm (1σ); 15 cm typical
Pseudo-range Bias < 5 cm (1σ); 3 cm typical
Carrier Phase 0.35 cm (1 sigma/1 sec); 0.15 cm typical
Battery 1794AS0953A/U
Carrier Phase Integrity 0.001 (prob of disruption/hr)
Navigation** (10 sec update) Absolute Position: 8.5 m (1σ); 3 m typical
Absolute Velocity: 2 cm/s (1σ); 0.7 cm/sec typical
Clock Offset Solution Error: 20 ns (1σ); < 5 ns typical
Relative Position: 0.5 m (1σ); 0.25 m typical
Relative Velocity: 0.005 m/s (1σ)
Relative Clock Offset: 4 ns (1σ)
Time Tag Measurements Coarse Time Transfer TTL In/Out: 100 ns (1σ)
Precision Time Transfer ECL In/Out: 20 ns (1σ); 5 ns typical
Relative Time Transfer: 4 ns (1σ)
Startup Time Cold: 35 minutes (Pf > 90%, typ 15 minutes w/key data)
Warm: 25 minutes (Pf > 90%, typ 3 minutes w/key data)
Physical Characteristics Envelope Dimensions: 8.06”L x 7.85”W x 5.52”H
Weight: 8.2 pounds nominal
Power: 25 W max; 19 W steady state typ
Environmental Capabilities Radiation: 100 krads
Single Event Upset: < 1 per year
Single Event Latchup: Immune
Reliability: 0.91 @10 years, 35°C baseplate, 100% duty cycle
Random Vibration: 16.6 Grms
Pyro Shock: 3000 G
Temperature: -34 to +71°C
Orbital Dynamics: LEO, MEO, GEO***